Iterative method for region-of-interest reconstruction
    9.
    发明授权
    Iterative method for region-of-interest reconstruction 有权
    用于重建区域的迭代法

    公开(公告)号:US06768782B1

    公开(公告)日:2004-07-27

    申请号:US10319689

    申请日:2002-12-16

    IPC分类号: A61B603

    摘要: An imaging system is provided including a source generating an x-ray beam and a detector array receiving the x-ray beam and generating projection data corresponding to at least a scanned portion of an object. An image reconstructor is electrically coupled to said detector array and reconstructs an image of the scanned portion of the object for a full field-of-view in response to said projection data using a dual iterative reconstruction technique. The dual iterative reconstruction technique includes reconstructing the full field-of-view using a first resolution and reconstructing a region-of-interest within the full FOV using a second resolution. A method is also provided for reconstructing an image using projection data from such an imaging system.

    摘要翻译: 提供了一种成像系统,包括产生x射线束的源和接收x射线束的检测器阵列,并且产生与至少对象的扫描部分对应的投影数据。 图像重构器电耦合到所述检测器阵列,并且使用双重迭代重建技术来响应于所述投影数据重建对象的扫描部分的图像以获得完整的视野。 双重迭代重建技术包括使用第一分辨率重构全视野并且使用第二分辨率来重构全FOV内的感兴趣区域。 还提供了一种用于使用来自这种成像系统的投影数据来重建图像的方法。

    SYSTEM AND METHOD OF INCREASING TEMPORAL RESOLUTION OF AN X-RAY IMAGE
    10.
    发明申请
    SYSTEM AND METHOD OF INCREASING TEMPORAL RESOLUTION OF AN X-RAY IMAGE 有权
    增加X射线图像的时间分辨率的系统和方法

    公开(公告)号:US20120314928A1

    公开(公告)日:2012-12-13

    申请号:US13593156

    申请日:2012-08-23

    IPC分类号: G06K9/46

    摘要: A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.

    摘要翻译: 系统,方法和装置包括具有可旋转机架,X射线源,发生器,具有像素并被定位成接收x射线的检测器的计算机断层摄影(CT)系统和计算机。 计算机被编程为获取表示对象的CT数据,确定CT数据的第一子集,确定CT数据的第二子集,并且确定CT数据的第一和第二子集之间的差异,以识别运动区域 在对象中。 计算机还被编程为更新从CT数据的第一子集的第一部分重建并对应于该区域的图像数据,并且基于更新的图像数据和未更新的图像数据重建图像。 从CT数据的第一子集的第二部分重构未更新的图像数据。